Electronic calendar



FIG. 1 is a front perspective view of an electronic calendar showing my new design;

FIG. 2 is a rear plan view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top edge view thereof; and,

FIG. 6 is a bottom edge view thereof. 

The ornamental design for an electronic calendar, as shown. 